Ok, I just looked through my post history. This kind of thing has been ongoing for years. Tim (network guy at NG) tried to get it resolved, but when he called the ISP in question, he got through to people who couldn't speak English (and he doesn't, to my knowledge, speak Spanish) - so I think that's as far as he got.
For reference:
http://www.newgrounds.com/bbs/topic/8154 47 That was in 2007
http://www.newgrounds.com/bbs/topic/1087 847 July 2009
Jixter, you seem to have a good grasp of English (and I'm assuming you also speak Spanish), so if you call your ISP and find out what's going on with requests to:
uploads.ungrounded.net
That's the domain that the NG flash content is loaded from. It's on a Cogent network (as are the pages you're reading right now, though for some reason, those load fine and the flash domain doesn't). Hopefully they can then get the matter resolved. Let us know how you get on.